A famous Weibo and Twitter tipster called Ice Universe, published two design schematics of the Samsung Galaxy S9+ and Galaxy Note9. The graphics reveal that the positioning of the dual camera sensors correlates with the size of the battery, so that's why the Note9 might end up with horizontally-stacked cameras. If this is true, the Galaxy Note9 will incorporate a slightly bigger battery. But due to customer complaints about the Note8's fingerprint reader being placed too close to the camera sensor and when reaching for it, they are smudging the camera lens. Luckily, the Note9 will go...
Source: https://www.gsmarena.com/galaxy_note9s_schematics_point_at_bigger_battery_fcc_approves_a_fast_wireless_charger-news-31645.php